Synthesis and Characterization of Mn-Doped ZnO Nanocrystals.
We report the synthesis and characterization of several sizes of Mn-doped ZnO nanocrystals, both in the free-standing and the capped particle forms. The sizes of these nanocrystals could be controlled by capping them with polyvinylpyrollidone under different synthesis conditions and were estimated by X-ray diffraction and transmission electron microscopy. The absorption properties of PVP-capped Mn-doped ZnO exhibit an interesting variation of the band gap with the concentration of Mn. Fluorescence emission, electron paramagnetic resonance, and X-ray absorption spectroscopy provide evidence for the presence of Mn in the interior as well as on the surface of the nanocrystals.
Viswanatha
Ranjani
R
Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore-560012, India, and Institute of Physics, Sachivalaya Marg, Bhubaneshwar-751005, India.
Sapra
Sameer
S
Gupta
Subhra Sen
SS
Satpati
B
B
Satyam
P V
PV
Dev
B N
BN
Sarma
D D
DD